number_hash = {
	"PI" => 3.14,
	"Golden" => 1.618,
	"e" => 2.718
}

puts number_hash["PI"]

superheroes = Hash["Clark Kent", "Superman", "Bruce Wayne", "Batman"]

puts superheroes["Clark Kent"]

superheroes["Balley Kent"] = "Flash"
puts superheroes

sample_hash = Hash.new("No Such Key")
puts sample_hash["Dog"]

superheroines = Hash["Lily", "Super", "Wayne", "Bat"]
superheroes.update(superheroines)

superheroes.each do |key, value|
	puts key.to_s + ":" + value
end 

puts superheroes.has_key?("Lily")
puts superheroes.has_value?("Super")
puts superheroes.empty?.to_s
puts superheroes.size.to_s

superheroes.delete("Lily")
puts superheroes
